Published in: Monographs in theoretical computer science : an EATCS series

Published in: Cambridge mathematical library

Published in: SIAM Journal on Computing, 26 (1997) 3, Seite 764-771

Published in: Lecture Notes in Computer Science (1993), Seite 595-606

Published in: Theoretical Computer Science, 99 (1992) 2, Seite 291-299

Published in: Theoretical Computer Science, 98 (1992) 1, Seite 41-50

Published in: Theoretical Computer Science, 73 (1990) 1, Seite 81-89

Published in: Semigroup Forum, 38 (1989) 1, Seite 331-335

Published in: Acta Informatica, 36 (2000) 9-10, Seite 817-835

Published in: Lecture Notes in Computer Science (1998), Seite 87-102

Published in: Theoretical Computer Science, 180 (1997) 1-2, Seite 1-15

Published in: SIAM Journal on Computing, 25 (1996) 6, Seite 1268-1280

Published in: Discrete Mathematics, 153 (1996) 1-3, Seite 239-251

Published in: Trees in Algebra and Programming — CAAP '96 (1996), Seite 17-29

Published in: Developments in Language Theory (2008), Seite 84-95

Published in: RAIRO - Theoretical Informatics and Applications, 40 (2006) 3, Seite 407-426

Published in: Developments in Language Theory (2004), Seite 139-150

Published in: Theoretical Computer Science, 327 (2004) 3, Seite 255-268

Published in: Developments in Language Theory (2003), Seite 230-241

Published in: Acta Informatica, 31 (1994) 6, Seite 539-557